ECU FORD GRANADA 1985 Service Repair Manual

Ignition/no-charge warning light remains illuminated
with engine running
m m
Auxiliary drivebelt broken, worn, or incorrectly adjusted (Chapter 1).m
mAlternator brushes worn, sticking, or dirty (Chapter 5).m
mAlternator brush springs weak or broken (Chapter 5).m
mInternal fault in alternator or voltage regulator (Chapter 5).m
mBroken, disconnected, or loose wiring in charging circuit (Chapter 5).
Ignition/no-charge warning light fails to come on
m m
Warning light bulb blown (Chapter 13).m
mBroken, disconnected, or loose wiring in warning light circuit
(Chapter 13).
m mAlternator faulty (Chapter 5).
Battery will not hold a charge for more than a few days
m m
Battery defective internally (Chapter 5).m
mBattery electrolyte level low - where applicable (Chapter 1).m
mBattery terminal connections loose or corroded (Chapter 1).m
mAuxiliary drivebelt worn - or incorrectly adjusted, where applicable
(Chapter 1).
m mAlternator not charging at correct output (Chapter 5).m
mAlternator or voltage regulator faulty (Chapter 5).m
mShort-circuit causing continual battery drain (Chapters 5 and 13).
Instrument readings inaccurate or erratic
Instrument readings increase with engine speed
m
mFaulty voltage regulator (Chapter 13).
Fuel or temperature gauges give no reading
m
mFaulty gauge sender unit (Chapters 4 and 5).m
mWiring open-circuit (Chapter 13).m
mFaulty gauge (Chapter 13).
Fuel or temperature gauges give continuous maximum
reading
m mFaulty gauge sender unit (Chapters 4 and 5).m
mWiring short-circuit (Chapter 13).m
mFaulty gauge (Chapter 13).
Horn inoperative, or unsatisfactory in operation
Horn operates all the time
m
mHorn contacts permanently bridged or horn push stuck down
(Chapter 13).
Horn fails to operate
m mBlown fuse (Chapter 13).m
mCable or cable connections loose, broken or disconnected
(Chapter 13).
m mFaulty horn (Chapter 13).
Horn emits intermittent or unsatisfactory sound
m
mCable connections loose (Chapter 13).m
mHorn mountings loose (Chapter 13).m
mFaulty horn (Chapter 13).
Windscreen/tailgate wipers inoperative, or
unsatisfactory in operation
Wipers fail to operate, or operate very slowly
m mWiper blades stuck to screen, or linkage seized or binding
(Chapters 1 and 13).
m mBlown fuse (Chapter 13).m
mCable or cable connections loose, broken or disconnected
(Chapter 13).
m mFaulty relay (Chapter 13).m
mFaulty wiper motor (Chapter 13).
Wiper blades sweep over too large or too small an area of
the glass
m mWiper arms incorrectly positioned on spindles (Chapter 1).m
mExcessive wear of wiper linkage (Chapter 13).m
mWiper motor or linkage mountings loose or insecure (Chapter 13).
Wiper blades fail to clean the glass effectively
m
mWiper blade rubbers worn or perished (Chapter 1).m
mWiper arm tension springs broken, or arm pivots seized (Chapter 13).m
mInsufficient windscreen washer additive to adequately remove road
film (Chapter 1).
Windscreen/tailgate washers inoperative, or
unsatisfactory in operation
One or more washer jets inoperative
m mBlocked washer jet (Chapter 1).m
mDisconnected, kinked or restricted fluid hose (Chapter 13).m
mInsufficient fluid in washer reservoir (Chapter 1).
Washer pump fails to operate
m
mBroken or disconnected wiring or connections (Chapter 13).m
mBlown fuse (Chapter 13).m
mFaulty washer switch (Chapter 13).m
mFaulty washer pump (Chapter 13).
Washer pump runs for some time before fluid is emitted
from jets
m mFaulty one-way valve in fluid supply hose (Chapter 13).
Electric windows inoperative, or unsatisfactory in
operation
Window glass will only move in one direction
m mFaulty switch (Chapter 13).
Window glass slow to move
m
mRegulator seized or damaged, or in need of lubrication (Chapter 12).m
mDoor internal components or trim fouling regulator (Chapter 12).m
mFaulty motor (Chapter 12).
Window glass fails to move
m
mBlown fuse (Chapter 13).m
mFaulty relay (Chapter 13).m
mBroken or disconnected wiring or connections (Chapter 13).m
mFaulty motor (Chapter 13).
Central locking system inoperative, or unsatisfactory
in operation
Complete system failure
m mBlown fuse (Chapter 13).m
mFaulty relay (Chapter 13).m
mBroken or disconnected wiring or connections (Chapter 13).
Latch locks but will not unlock, or unlocks but will not lock
m
mFaulty switch (Chapter 13).m
mBroken or disconnected latch operating rods or levers (Chapter 12).m
mFaulty relay (Chapter 13).
One solenoid/motor fails to operate
m
mBroken or disconnected wiring or connections (Chapter 13).m
mFaulty solenoid/motor (Chapter 12).m
mBroken, binding or disconnected latch operating rods or levers
(Chapter 12).
m mFault in door latch (Chapter 12).
REF•11Fault Finding
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REF•13Glossary of Technical Terms
Catalytic converterA silencer-like device in
the exhaust system which converts certain
pollutants in the exhaust gases into less
harmful substances.
CirclipA ring-shaped clip used to prevent
endwise movement of cylindrical parts and
shafts. An internal circlip is installed in a
groove in a housing; an external circlip fits into
a groove on the outside of a cylindrical piece
such as a shaft.
ClearanceThe amount of space between
two parts. For example, between a piston and
a cylinder, between a bearing and a journal,
etc.
Coil springA spiral of elastic steel found in
various sizes throughout a vehicle, for
example as a springing medium in the
suspension and in the valve train.
CompressionReduction in volume, and
increase in pressure and temperature, of a
gas, caused by squeezing it into a smaller
space.
Compression ratioThe relationship between
cylinder volume when the piston is at top
dead centre and cylinder volume when the
piston is at bottom dead centre.
Constant velocity (CV) jointA type of
universal joint that cancels out vibrations
caused by driving power being transmitted
through an angle.
Core plugA disc or cup-shaped metal device
inserted in a hole in a casting through which
core was removed when the casting was
formed. Also known as a freeze plug or
expansion plug.
CrankcaseThe lower part of the engine
block in which the crankshaft rotates.
CrankshaftThe main rotating member, or
shaft, running the length of the crankcase,
with offset “throws” to which the connecting
rods are attached.
Crocodile clipSee Alligator clipDDiagnostic codeCode numbers obtained by
accessing the diagnostic mode of an engine
management computer. This code can be
used to determine the area in the system
where a malfunction may be located.
Disc brakeA brake design incorporating a
rotating disc onto which brake pads are
squeezed. The resulting friction converts the
energy of a moving vehicle into heat.
Double-overhead cam (DOHC)An engine
that uses two overhead camshafts, usually
one for the intake valves and one for the
exhaust valves.
Drivebelt(s)The belt(s) used to drive
accessories such as the alternator, water
pump, power steering pump, air conditioning
compressor, etc. off the crankshaft pulley.
DriveshaftAny shaft used to transmit
motion. Commonly used when referring to the
axleshafts on a front wheel drive vehicle.
Drum brakeA type of brake using a drum-
shaped metal cylinder attached to the inner
surface of the wheel. When the brake pedal is
pressed, curved brake shoes with friction
linings press against the inside of the drum to
slow or stop the vehicle.
EEGR valveA valve used to introduce exhaust
gases into the intake air stream.
Electronic control unit (ECU)A computer
which controls (for instance) ignition and fuel
injection systems, or an anti-lock braking
system. For more information refer to the
Haynes Automotive Electrical and Electronic
Systems Manual.
Electronic Fuel Injection (EFI)A computer
controlled fuel system that distributes fuel
through an injector located in each intake port
of the engine.
Emergency brakeA braking system,
independent of the main hydraulic system,
that can be used to slow or stop the vehicle if
the primary brakes fail, or to hold the vehicle
stationary even though the brake pedal isn’t
depressed. It usually consists of a hand lever
that actuates either front or rear brakes
mechanically through a series of cables and
linkages. Also known as a handbrake or
parking brake.EndfloatThe amount of lengthwise
movement between two parts. As applied to a
crankshaft, the distance that the crankshaft
can move forward and back in the cylinder
block.
Engine management system (EMS)A
computer controlled system which manages
the fuel injection and the ignition systems in
an integrated fashion.
Exhaust manifoldA part with several
passages through which exhaust gases leave
the engine combustion chambers and enter
the exhaust pipe.
F
Fan clutchA viscous (fluid) drive coupling
device which permits variable engine fan
speeds in relation to engine speeds.
Feeler bladeA thin strip or blade of hardened
steel, ground to an exact thickness, used to
check or measure clearances between parts.
Firing orderThe order in which the engine
cylinders fire, or deliver their power strokes,
beginning with the number one cylinder.
Flywheel A heavy spinning wheel in which
energy is absorbed and stored by means of
momentum. On cars, the flywheel is attached
to the crankshaft to smooth out firing
impulses.
Free playThe amount of travel before any
action takes place. The “looseness” in a
linkage, or an assembly of parts, between the
initial application of force and actual
movement. For example, the distance the
brake pedal moves before the pistons in the
master cylinder are actuated.
FuseAn electrical device which protects a
circuit against accidental overload. The typical
fuse contains a soft piece of metal which is
calibrated to melt at a predetermined current
flow (expressed as amps) and break the
circuit.
Fusible linkA circuit protection device
consisting of a conductor surrounded by
heat-resistant insulation. The conductor is
smaller than the wire it protects, so it acts as
the weakest link in the circuit. Unlike a blown
fuse, a failed fusible link must frequently be
cut from the wire for replacement.Catalytic converter
Crankshaft assembly
Accessory drivebelts
Feeler blade
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